<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <div>
            <span>姓名:</span>
            <input type="text" v-model.trim="name" />
        </div>
        <div>
            <span>年龄:</span>
            <input type="number" v-model.trim.number="age" />
        </div>
        <div>
            <span>性别:</span>
            <select v-model="gender">
                <option value="男">男</option>
                <option value="女">女</option>
            </select>
        </div>
        <div>
            <button @click="add">添加/修改</button>
        </div>
        <div>
            <table border="1" cellpadding="10" cellspacing="0">
                <tr>
                    <th>序号</th>
                    <th>姓名</th>
                    <th>年龄</th>
                    <th>性别</th>
                    <th>操作</th>
                </tr>
                <tr v-for="(item,index) in arr" :key="item.id">
                    <td>{{index+1}}</td>
                    <td>{{item.name}}</td>
                    <td>{{item.age}}</td>
                    <td>{{item.gender}}</td>
                    <td>
                        <button @click="del(item.id)">删除</button>
                        <button @click="emit(item)">编辑</button>
                    </td>
                </tr>
            </table>
        </div>
    </div>
    <script src="./vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                arr: [
                    { id: 1, name: 'Tom', age: 18, gender: '男' },
                    { id: 2, name: 'Jerry', age: 20, gender: '男' }
                ],
                name: '',
                age: '',
                gender: '男',
                falg: true,
                curId: ''
            },
            methods: {
                add() {
                    if (this.name === '' || this.age === '') return alert('名字和年龄不能为空')
                    if (this.falg === true) {
                        this.arr.unshift({
                            id: +new Date,
                            name: this.name,
                            age: this.age,
                            gender: this.gender,
                        })
                        this.name = ''
                        this.age = ''
                        this.gender = '男'
                    }else{
                        let newArr = this.arr.filter((item) => item.id === this.curId);
                        newArr[0].gender = this.gender;
                        newArr[0].name = this.name;
                        newArr[0].age = this.age;
                        this.falg = true
                        this.name = ''
                        this.age = ''
                        this.gender = '男'
                    }
                },
                del(id) {
                    this.arr = this.arr.filter(item => item.id !== id)
                },
                emit(item) {
                    console.log(item)
                    this.curId = item.id
                    this.falg = false
                    this.name = item.name
                    this.age = item.age
                    this.gender = item.gender
                }
            }
        })
    </script>
</body>

</html>